<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
     <el-header>
         <div>
             <img src="" alt="">
             <span>电商后台管理系统</span>
         </div>
            <el-button type="info" @click="logout">退出</el-button>
     </el-header>
        <el-container>
        <!--侧边菜单栏区域  -->
     <el-aside :width="isCollapse? '64px' : '200px'">
               <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu default-active="2" class="el-menu-vertical-demo" 
                 background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false"
                 router :defaultActive="this.$route.path">
                 <!-- :defaultActive="this.$route.path" 二级菜单点击状态高亮 -->
                 <!-- 一级菜单 -->
                 <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                    <template slot="title">
                       <i :class="iconsObj[item.id]"></i>
                       <span>{{item.authName}}</span>
                    </template>
                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/' + subItem.path " v-for="subItem in item.children" :key="subItem.id">
                    <template slot="title">
                       <i class="el-icon-menu"></i>
                       <span>{{subItem.authName}}</span> 
                    </template>
                    </el-menu-item>
                </el-submenu>  
            </el-menu>
   </el-aside>
    <!--右侧内容主体  -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data(){
         return{
             //左侧菜单数据
             menulist: [],
             iconsObj: {
                 '125' : 'el-icon-user',
                 '103' : 'el-icon-setting',
                 '101' : 'el-icon-goods',
                 '102' : 'el-icon-tickets',
                 '145' : 'el-icon-s-data'
             },
             isCollapse : false
         }
    },
    created() {
        this.getMenuList()
    },
    methods: {
        logout() {
            window.sessionStorage.clear();
            this.$router.push('/login');
        },
        //获取所有菜单
        async getMenuList()  {
           const {data : res} = await  this.$http.get('menus')
           if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
           this.menulist = res.data  
        },
        //左侧菜单折叠与展开
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        }
    }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}

.el-header {
 background-color: #373d41;
 display: flex;
 justify-content:space-between;//左右贴边
 padding-left: 0;
 align-content: center;
 color:#fff;
 font-size: 20px; 
 >div{
     display: flex;
     align-items: center;
     span{
         margin-left: 15px;
     }
 }
}

.el-aside {
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main {
    background-color: #eaedf1;
}

.el-button {
    margin: 10px;
}

.toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;//行高
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em; //线距
    cursor:pointer; //鼠标放置变成手指
}
</style>